image.sahrlocs {adehabitat} | R Documentation |
image.sahrlocs
allows a gray-level display of the composition
of home ranges (different colors are used for factors).
For a given variable, the minimum gray level (default is
"white"
) and the maximum gray level (default is "black"
)
represents respectively the minimum and the maximum of the variable
***on the study area***.
## S3 method for class 'sahrlocs': image(x, ani = names(x$hr), var = names(x$sa), mar = c(0, 0, 0, 0), axes = FALSE, dfidxy = NULL, colpts = "black", pch = 21, bg = "white", inv = FALSE, cexpts = 0.6, csub = 2, possub = c("bottomleft", "bottomright", "topleft", "topright"), ...)
x |
an object of class sahrlocs |
ani |
a character vector giving the names of the
variables of the "hr" component (the animals) for which a
display is wanted |
var |
a character vector giving the names of the
variables of the "sa" component (the habitat variables) for
which a display is wanted |
mar |
the graphical parameter mar (see
par ) |
axes |
logical. Whether the axes should be plotted |
csub |
the character size for the legend, used with
par("cex")*csub |
possub |
a character string indicating the sub-title position
("topleft" , "topright" , "bottomleft" ,
"bottomright" ) |
dfidxy |
an optional data frame with three columns giving the
identity and the coordinates of the relocations of each animal. (if
not NULL , the relocations of each animal are plotted in its
home range, see Examples) |
colpts |
if dfidxy is not NULL , the color of the
points to be used for the plot of the relocations |
pch |
if dfidxy is not NULL , the size of the points
to be used for the plot of the relocations (see par ) |
bg |
if dfidxy is not NULL , the background color to
be used for the plot of the relocations (see par ) |
inv |
by default, lower values of the mapped variables are
brighter. If FALSE , the lower values are darker |
cexpts |
if dfidxy is not NULL , the size of the points |
... |
additionnal parameters to be passed to the generic
function image |
Clement Calenge clement.calenge@oncfs.gouv.fr
as.sahrlocs
for additionnal information on
objects of class sahrlocs
data(puechabon) (sahr <- puechabon$sahr) ## Displays all the variables for a given animal image(sahr, ani = "Chou") ## Displays all the animals for a given variable image(sahr, var = "Elevation") ## Load and displays the relocations of the animals locs <- puechabon$locs[,c(1,4:5)] image(sahr, var = "Elevation", dfidxy = locs, pch = 21)